Apparently CHOW.com is filled with beer geeks, because I was browsing around YouTube recently, and discovered they have a whole series of videos on how to open a beer bottle using a variety of techniques and instruments.
First, opening a twist-off with your forearm:
Opening a bottle with a carabiner:
Opening a bottle with a pen:
Opening a bottle with paper:
And finally, opening a bottle with another bottle:
Well done CHOW.com, the world will never get stuck with another un-openable bottle again!